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Distributed resources of Czech WLCG Tier-2 center
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SYSNO ASEP 0538464 Document Type C - Proceedings Paper (int. conf.) R&D Document Type Conference Paper Title Distributed resources of Czech WLCG Tier-2 center Author(s) Adam, Martin (UJF-V)
Adamová, Dagmar (UJF-V) RID, ORCID, SAI
Chudoba, Jiří (FZU-D) RID, ORCID
Mikula, Alexandr (FZU-D)
Svatoš, Michal (FZU-D) RID, ORCID
Uhlířová, Jana (FZU-D)
Vokáč, P. (CZ)Number of authors 7 Article number 03034 Source Title EPJ Web of Conferences, 245. - Les Ulis : EDP Sciences, 2020 / Doglioni C. ; Jackson P. ; Kamleh W. ; Kim D.Y. ; Silvestris L. ; Stewart G.A. - ISSN 2100-014X Number of pages 7 s. Publication form Print - P Action International Conference on Computing in High Energy and Nuclear Physics (CHEP 2019) /24./ Event date 04.11.2019 - 08.11.2019 VEvent location Adelaide Country AU - Australia Event type WRD Language eng - English Country FR - France Keywords CC IoP ; data distribution Subject RIV BG - Nuclear, Atomic and Molecular Physics, Colliders OECD category Astronomy (including astrophysics,space science) Subject RIV - cooperation Institute of Physics - Computer Applications, Robotics R&D Projects EF16_013/0001404 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) LM2018104 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) Research Infrastructure CERN-CZ - 90058 - Fyzikální ústav AV ČR, v. v. i. Institutional support FZU-D - RVO:68378271 ; UJF-V - RVO:61389005 UT WOS 000652214300112 DOI 10.1051/epjconf/202024503034 Annotation The Computing Center of the Institute of Physics (CC IoP) of the Czech Academy of Sciences provides compute and storage capacity to several physics experiments. Most resources are used by two LHC experiments, ALICE and ATLAS. In the WLCG, which coordinates computing activities for the LHC experiments, the computing center is Tier-2. The rest of computing resources is used by astroparticle experiments like the Pierre Auger Observatory (PAO) and the Cherenkov Telescope Array (CTA) or particle experiments like NOvA and DUNE. Storage capacity is distributed to several locations. DPM servers used by the ATLAS and the PAO are all in the same server room. ALICE uses several xrootd servers located at the Nuclear Physics Institute in Rez, about 10 km away. The storage capacity for the ATLAS and the PAO is extended by resources of the CESNET (the Czech National Grid Initiative representative) located in Ostrava, more than 100 km away from the CC IoP. Storage is managed by dCache instance, which is published in the CC IoP BDII. ATLAS users can use these resources using the standard ATLAS tools in the same way as the local storage without noticing this geographical distribution. The computing center provides about 8k CPU cores which are used by the experiments based on fair-share. The CPUs are distributed amongst server rooms in the Institute of Physics, in the Faculty of Mathematics and Physics of the Charles University, and in CESNET. For the ATLAS experiment, the resources are extended by opportunistic usage of the Salomon HPC provided by the Czech national HPC center IT4Innovations in Ostrava. The HPC provides 24-core nodes. The maximum number of allowed single-node jobs in the batch system is 200. The contribution of the HPC to the CPU consumption by the ATLAS experiment is about 15% on average. Workplace Nuclear Physics Institute Contact Markéta Sommerová, sommerova@ujf.cas.cz, Tel.: 266 173 228 Year of Publishing 2021
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